---
key: mechanic/boss-fight-atlas--boss-boundary-attack
type: mechanic
id: boss-fight-atlas--boss-boundary-attack
lang: en
title: Boundary attack
summary: A source at the arena boundary sends a threat into playable space.
updatedAt: '2026-10-22'
status: active
url: >-
https://gamemechanics.pro/en/knowledge/mechanic/boss-fight-atlas--boss-boundary-attack/
jsonUrl: >-
https://gamemechanics.pro/api/v1/knowledge/en/mechanic/boss-fight-atlas--boss-boundary-attack.json
markdownUrl: >-
https://gamemechanics.pro/content/knowledge/en/mechanic/boss-fight-atlas--boss-boundary-attack.md
aliases: []
tags:
- Boss fights
- 'Space, movement, and perception'
sourceIds:
- source-be3c10532f14f200
- source-a69b6c55489850b2
- source-6f134fab3b095acb
- source-938d01176a1635ea
- source-75e04a087540638a
- source-945019fe5d82d809
- source-0b0aa37f1d6edbc8
- source-8bb66b0ff7394aa3
- source-83b0d4ca78ec8bbc
- source-b96949457d584b59
sources:
- id: source-be3c10532f14f200
title: 'Boss Fight Atlas: Boundary attack (RU)'
url: >-
https://polyakovin.github.io/boss-fight-atlas/ru/mechanics/boundary-attack/
verifiedAt: null
- id: source-a69b6c55489850b2
title: 'Boss Fight Atlas: Boundary attack (EN)'
url: >-
https://polyakovin.github.io/boss-fight-atlas/en/mechanics/boundary-attack/
verifiedAt: null
- id: source-6f134fab3b095acb
title: Kuro finale · Ori and the Blind Forest
url: 'https://www.youtube.com/watch?v=Kx9DPTIDB_0&t=1s'
verifiedAt: null
- id: source-938d01176a1635ea
title: Shriek · Ori and the Will of the Wisps
url: 'https://www.youtube.com/watch?v=DvuB8cImPIg&t=1165s'
verifiedAt: null
- id: source-75e04a087540638a
title: 'Leviathan (Eden''s Gate: Inundation) · Final Fantasy XIV'
url: 'https://www.youtube.com/watch?v=9H9-GJmVqGE&t=170s'
verifiedAt: null
- id: source-945019fe5d82d809
title: GDC · Itay Keren — Boss Battle Design Fundamentals and Retrospective
url: 'https://www.gdcvault.com/play/1024921/Boss-Up-Boss-Battle-Design'
verifiedAt: null
- id: source-0b0aa37f1d6edbc8
title: Xbox Wire — Escape Kuro's Clutches
url: >-
https://news.xbox.com/en-us/2019/09/20/pre-purchase-ori-and-the-blind-forest-definitive-edition-for-nintendo-switch/
verifiedAt: null
- id: source-8bb66b0ff7394aa3
title: GameFAQs — Shriek
url: >-
https://gamefaqs.gamespot.com/xboxone/211254-ori-and-the-will-of-the-wisps/faqs/78217/willows-end
verifiedAt: null
- id: source-83b0d4ca78ec8bbc
title: 'Final Fantasy XIV Online Wiki — Eden''s Gate: Inundation'
url: 'https://ffxiv.consolegameswiki.com/wiki/Eden%27s_Gate:_Inundation'
verifiedAt: null
- id: source-b96949457d584b59
title: Hollow Knight
url: 'https://www.youtube.com/watch?v=bgh04-wCRyk&t=62s'
verifiedAt: null
relations: []
placements:
- catalogId: boss-fight-atlas
id: boss-boundary-attack
title: Boss fights
url: >-
https://gamemechanics.pro/en/mechanics/boss-fight-atlas/#boss-boundary-attack
categoryIds:
- catalog-part-10
supersededBy: []
attributes:
preview:
updatedAt: '2026-10-22'
title: Boundary attack
description: A source at the arena boundary sends a threat into playable space.
image:
src: images/mechanics/boss-final-bgh04-wcryk-62.webp
width: 640
height: 360
game: Hollow Knight
sourceUrl: 'https://www.youtube.com/watch?v=bgh04-wCRyk&t=62s'
originalUrl: 'https://www.youtube.com/watch?v=bgh04-wCRyk'
sourceFrameSeconds: 62
credit: Team Cherry; gameplay capture by PrizMatex
rights: >-
Game graphics © Team Cherry. Gameplay recording by PrizMatex. Original
visible source markings retained. All rights reserved; excluded from
portal MIT and CC BY 4.0.
caption: 'Hollow Knight: a light wall enters from Radiance’s arena edge'
alt: 'Hollow Knight: a light wall enters from Radiance’s arena edge'
markers:
- x: 96
'y': 49
label: The threat enters from the boundary and crosses playable space
tips:
- >-
Signal incoming boundary threats, especially when their source is off
camera.
examples:
- title: Hollow Knight
url: 'https://www.youtube.com/watch?v=bgh04-wCRyk&t=62s'
endsAt: null
provenance: >-
Editorial reference index based on the 124 public Boss Fight Atlas mechanic
pages checked on 2026-10-20. Original concise RU/EN definitions by
gamemechanics.pro; source categories, game/boss associations and reference
URLs retained from the atlas. Linked materials retain their original rights;
references are upstream attributions, not independent verification.
license: CC-BY-4.0
codeLicense: MIT
attribution: gamemechanics.pro contributors
catalogKey: catalog/boss-fight-atlas
---
# Boundary attack
id: boss-fight-atlas--boss-boundary-attack
type: mechanic
key: mechanic/boss-fight-atlas--boss-boundary-attack
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/boss-fight-atlas--boss-boundary-attack/
A source at the arena boundary sends a threat into playable space.
## At a glance
[Hollow Knight](https://www.youtube.com/watch?v=bgh04-wCRyk&t=62s) · Game graphics © Team Cherry. Gameplay recording by PrizMatex. Original visible source markings retained. All rights reserved; excluded from portal MIT and CC BY 4.0.
[Source recording](https://www.youtube.com/watch?v=bgh04-wCRyk), 62 s
1. The threat enters from the boundary and crosses playable space
- Signal incoming boundary threats, especially when their source is off camera.
- [Hollow Knight](https://www.youtube.com/watch?v=bgh04-wCRyk&t=62s)
## How it works
A source at the arena boundary sends a threat into playable space.
## Variants
### How the technique works
- A source at the arena boundary sends a threat into playable space.
## Context and limits
A concise reference to all 124 Boss Fight Atlas mechanics across its 14 source sections. Each entry includes a definition, full RU/EN lesson links, game references and further reading retained from the source. Animations and detailed rules remain in the atlas.
## Connected materials
## Sources and provenance
Editorial reference index based on the 124 public Boss Fight Atlas mechanic pages checked on 2026-10-20. Original concise RU/EN definitions by gamemechanics.pro; source categories, game/boss associations and reference URLs retained from the atlas. Linked materials retain their original rights; references are upstream attributions, not independent verification.
- [Boss Fight Atlas: Boundary attack (RU)](https://polyakovin.github.io/boss-fight-atlas/ru/mechanics/boundary-attack/) (id: source-be3c10532f14f200)
- [Boss Fight Atlas: Boundary attack (EN)](https://polyakovin.github.io/boss-fight-atlas/en/mechanics/boundary-attack/) (id: source-a69b6c55489850b2)
- [Kuro finale · Ori and the Blind Forest](https://www.youtube.com/watch?v=Kx9DPTIDB_0&t=1s) (id: source-6f134fab3b095acb)
- [Shriek · Ori and the Will of the Wisps](https://www.youtube.com/watch?v=DvuB8cImPIg&t=1165s) (id: source-938d01176a1635ea)
- [Leviathan (Eden's Gate: Inundation) · Final Fantasy XIV](https://www.youtube.com/watch?v=9H9-GJmVqGE&t=170s) (id: source-75e04a087540638a)
- [GDC · Itay Keren — Boss Battle Design Fundamentals and Retrospective](https://www.gdcvault.com/play/1024921/Boss-Up-Boss-Battle-Design) (id: source-945019fe5d82d809)
- [Xbox Wire — Escape Kuro's Clutches](https://news.xbox.com/en-us/2019/09/20/pre-purchase-ori-and-the-blind-forest-definitive-edition-for-nintendo-switch/) (id: source-0b0aa37f1d6edbc8)
- [GameFAQs — Shriek](https://gamefaqs.gamespot.com/xboxone/211254-ori-and-the-will-of-the-wisps/faqs/78217/willows-end) (id: source-8bb66b0ff7394aa3)
- [Final Fantasy XIV Online Wiki — Eden's Gate: Inundation](https://ffxiv.consolegameswiki.com/wiki/Eden%27s_Gate:_Inundation) (id: source-83b0d4ca78ec8bbc)
- [Hollow Knight](https://www.youtube.com/watch?v=bgh04-wCRyk&t=62s) (id: source-b96949457d584b59)
CC-BY-4.0 · gamemechanics.pro contributors